Ranges in case statements

[kevjett]

I would like the ability to convert inclusive and exclusive ranges in case statements. Ex. below:

def mymethod
    case bp_range
    when -999...0
      10
    when 1...2
      100
    when 2..5
      120
    when 6..10
      150
    when 11...40
      129
    else
      150
    end
  end

It can be modeled after the solution in this discussion: https://stackoverflow.com/questions/5619832/switch-on-ranges-of-integers-in-javascript